/// <reference types="node" />
import { Transform } from 'stream';
import { FontTable, FontTableEntry } from './features/handleFonts.types';
import { FeatureHandler } from './features/types';
import { ProcessTokensGlobalState, ProcessTokensGroupState, ProcessTokensOptions } from './ProcessTokens.types';
import { Token } from './tokenize';
export declare const procTokensDefaultOptions: ProcessTokensOptions;
export declare abstract class ProcessTokens extends Transform implements ProcessTokensGlobalState {
    _options: ProcessTokensOptions;
    readonly _featureHandlers: FeatureHandler<ProcessTokensGlobalState>[];
    readonly _rootState: ProcessTokensGroupState;
    _state: ProcessTokensGroupState;
    _cpg: number;
    _count: number;
    _lastLastToken: Token | null | undefined;
    _lastToken: Token | null | undefined;
    _currToken: Token | null | undefined;
    _done: boolean;
    _ansicpg: boolean;
    _deff: string;
    _fonttbl: FontTable | undefined;
    _skip: number;
    constructor(options?: Partial<ProcessTokensOptions>);
    get defaultCodepage(): number;
    _getOutputAsString(data: string | Buffer, font: FontTableEntry | undefined): [string, boolean];
    _pushOutputData(outStr: string, areSymbolFontCodepoints: boolean): void;
    _getCurrentFont(): FontTableEntry | undefined;
    _pushOutput(data: Buffer | string): void;
    _handleToken(token: Token): void;
    _transform(token: Token, encoding: string | undefined, cb: (error?: any) => void): void;
    _flush(cb: (error?: any) => void): void;
}